Normally, the rooms of the house which was donated to the bedrooms of young people in the house are not very big and when we ran out of decorating ideas on how to exploit the little space for everything you need.
These rooms can be forever, so we have to consider that we should not focus on a decoration especially at an age, if we focus it to a future, neutral decor that pleases all ages.
Furniture should be in warm colors that appeal to all periods of life that inspires confidence and comfort.
The paintings that you can use are endless although personally recommend them soft but warm tones.
Remember that they are rooms that do not know when someone can relive, so the furniture to be disposed is a functional and utilitarian, to incorporate all necessary for life in general.
Some of the things that should be incorporated, are large wardrobes in which to be placed comfortably host all clothing. A desk for the guest to perform office level tasks. And all things necessary for life.
With these tips will get a room that survive to time.